Beat 'em ups have always been perfect games for co-op play. It all started with the 1987 arcade release of Double Dragon, a game that popularized co-op in a big way. Technos would go on to release The Combatribes, another quality beat 'em up that never made it quite as big as its forebear. Fast-forwarding to today, the iiRcade version of The Combatribes now supports 2-player online co-op! iiRcade is a home arcade platform for which users can buy individual games, a growing number of which feature online multiplayer.